E-drive motor torque ripple suppression algorithm research

Abstract

This paper analyzes different types of the resolver angle error, and introduces the rotor angle observer to reduce the angle ripple. The internal mode control algorithm is presented to reduce phase current ripple for big reluctance torque motor. Using this method for certain PHEV project in United Automotive Electronic Systems Cooperation, motor control current ripple is decreased by 77%, and torque ripple is reduced by 83% at the condition of 4000 rpm, 150Nm.